我正在尝试使用ListView，我想选择每一行来启动不同的活动，但OnItemSelectedItem方法在OnCreate的内部和外部都不起作用。
这是代码。
MainActivity：
package com.example.dos_6.app_chef.Activities;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.example.dos_6.app_chef.Adapters.MenuAdapter;
import com.example.dos_6.app_chef.Clases.Facultad;
import com.example.dos_6.app_chef.Clases.Menu;
import com.example.dos_6.app_chef.Clases.Pais;
import com.example.dos_6.app_chef.Clases.Universidad;
import com.example.dos_6.app_chef.R;
import com.example.dos_6.app_chef.Util.Util;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.client.RestTemplate;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static com.example.dos_6.app_chef.Util.Constantes.SERVER_GETFACULTAD_ID_UNI;
import static com.example.dos_6.app_chef.Util.Constantes.SERVER_GETMENU;
import static com.example.dos_6.app_chef.Util.Constantes.SERVER_GETMENU_DIA;
import static com.example.dos_6.app_chef.Util.Constantes.SERVER_GETMENU_ID_FACULTAD;
import static com.example.dos_6.app_chef.Util.Constantes.SERVER_GETPAIS;
import static com.example.dos_6.app_chef.Util.Constantes.SERVER_GETUNIVERSIDAD;
import static com.example.dos_6.app_chef.Util.Constantes.SERVER_URL;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener, View.OnClickListener, AdapterView.OnItemClickListener {
private Intent intent = null;
private Spinner spinner_universidad = null;
private Spinner spinner_facultad = null;
private Spinner spinner_dias = null;
private ListView lvMenu = null;
private ListView lvPlatos = null;
private TextView tv_primer = null;
private TextView tv_segundo = null;
private TextView tv_postre = null;
private TextView tv_bebida = null;
private Universidad universidad = null;
private List<Universidad> listaUniversidad = null;
private List<Facultad> listaFacultad = null;
private List<Pais> listaPais = null;
private List<Menu> listaMenu = null;
private List<Menu> listaPlatos = null;
private MenuAdapter menuAdapter = null;
private MenuAdapter platoAdapter = null;
private WebServiceMenu webServiceMenu = null;
//TODO nº Semana
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
listaUniversidad = new ArrayList<>();
listaFacultad = new ArrayList<>();
listaPais = new ArrayList<>();
listaPlatos = new ArrayList<>();
spinner_universidad = (Spinner) findViewById(R.id.main_spin_lista_uni);
spinner_dias = (Spinner) findViewById(R.id.main_spinner_dias);
//ListView start
lvPlatos = (ListView) findViewById(R.id.main_lv_platos);
lvPlatos.setOnItemClickListener(this);
String[] ps = this.getResources().getStringArray(R.array.platos_array);
Menu m;
for(int i = 0 ; i < ps.length; i++){
m = new Menu();
m.setNombre_plato(ps[i]);
getListaPlatos().add(m);
}
platoAdapter = new MenuAdapter(this, R.layout.menu_item, getListaPlatos());
lvPlatos.setAdapter(platoAdapter);
//ListView End
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
WebService webService = new WebService();
webService.execute();
listaMenu = new ArrayList<>();
universidad = new Universidad();
universidad.setId(0);
universidad.setNombre(getString(R.string.reg_spinner_pos0_universidad));
getListaUniversidad().add(0,universidad);
ArrayAdapter<Universidad> universidadArrayAdapter = new ArrayAdapter<Universidad>(this,
R.layout.support_simple_spinner_dropdown_item, getListaUniversidad());
spinner_universidad.getDropDownHorizontalOffset();
spinner_universidad.setAdapter(universidadArrayAdapter);
spinner_universidad.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
getListaFacultad().clear();
String uni = spinner_universidad.getItemAtPosition(spinner_universidad.getSelectedItemPosition()).toString();
seleccionarFacultad(uni);
ArrayAdapter<Facultad> arrayAdapter = new ArrayAdapter<Facultad>(getBaseContext(), R.layout.support_simple_spinner_dropdown_item, getListaFacultad());
spinner_facultad = (Spinner) findViewById(R.id.main_spin_lista_fac);
spinner_facultad.getDropDownHorizontalOffset();
spinner_facultad.setAdapter(arrayAdapter);
spinner_facultad.getOnItemSelectedListener();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
ArrayAdapter<String> diasAdapter = new ArrayAdapter<String>(this, R.layout.support_simple_spinner_dropdown_item, fillDias());
spinner_dias.getDropDownHorizontalOffset();
spinner_dias.setAdapter(diasAdapter);
spinner_dias.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Facultad facultad = (Facultad) spinner_facultad.getItemAtPosition(spinner_facultad.getSelectedItemPosition());
String dia = spinner_dias.getItemAtPosition(spinner_dias.getSelectedItemPosition()).toString();
if(spinner_dias.getSelectedItem().equals(spinner_dias.getItemAtPosition(0))){
return;
}else {
mostrarMenu(dia, String.valueOf(facultad.getId()));
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
return;
}
});
}
public void seleccionarFacultad(String uni) {
if (spinner_universidad.getSelectedItem().equals(spinner_universidad.getItemAtPosition(0))) {
Facultad facultad = new Facultad();
facultad.setNombre(getString(R.string.reg_spinner_pos0_facultad));
getListaFacultad().add(facultad);
} else {
for(Universidad universidad : getListaUniversidad()){
if(universidad.getNombre().equals(uni)){
Facultad facultad = new Facultad();
facultad.setNombre(getString(R.string.reg_spinner_posX_facultad));
getListaFacultad().add(0,facultad);
WebServiceFacultad webServiceFacultad = new WebServiceFacultad();
webServiceFacultad.execute(String.valueOf(universidad.getId()));
}
}
}
}
public void mostrarMenu(String dia, String id_facultad){
WebServiceMenu webServiceMenu = new WebServiceMenu();
webServiceMenu.execute(dia,id_facultad);
//menuAdapter = new MenuAdapter(this, R.layout.menu_item, getListaMenu());
//lvMenu.setAdapter(menuAdapter);
}
public ArrayList<String> fillDias(){
ArrayList<String> dias = null;
dias = new ArrayList<>();
dias.add(getString(R.string.weekday)+" "+Util.numerWeekOfYear());
//dias.add(getString(R.string.dia_pos0));
dias.add(getString(R.string.main_bt_lunes));
dias.add(getString(R.string.main_bt_martes));
dias.add(getString(R.string.main_bt_miercoles));
dias.add(getString(R.string.main_bt_jueves));
dias.add(getString(R.string.main_bt_viernes));
return dias;
}
@Override
public void onClick(View v) {
switch (v.getId()){
/*case R.id.main_tv_primer_plato:
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","1");
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
break;
case R.id.main_tv_seg_plato:
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","2");
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
break;
case R.id.main_tv_postre:
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","3");
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
break;
case R.id.main_tv_bebida:
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","4");
Menu menu = null;
List<Menu> menuList = new ArrayList<>();
getListaMenu().clear();
String[] bebidas = new String[]{"Agua","Refresco","Cerveza"};
for(int i = 0 ; i < 3;i++){
menu = new Menu();
menu.setOrden_plato("4");
menu.setNombre_plato(bebidas[i]);
getListaMenu().add(menu);
}
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
break;*/
}
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(position == ListView.INVALID_POSITION){
return;
}
Menu menu = getListaPlatos().get(position);
Intent intent;
if(menu.getNombre_plato().equalsIgnoreCase(getString(R.string.primer_plato))) {
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","1");
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
}else if(menu.getNombre_plato().equalsIgnoreCase(getString(R.string.segundo_plato))){
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","2");
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
}else if(menu.getNombre_plato().equalsIgnoreCase(getString(R.string.postre))){
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","3");
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
}else{
intent = new Intent(this, Platos_Activity.class);
intent.putExtra("orden","4");
Menu refrescos = null;
getListaMenu().clear();
String[] bebidas = this.getResources().getStringArray(R.array.bebidas_array);
for(int i = 0 ; i < 3;i++){
refrescos = new Menu();
refrescos.setOrden_plato("4");
refrescos.setNombre_plato(bebidas[i]);
getListaMenu().add(refrescos);
}
intent.putExtra("lista_menu",(Serializable) getListaMenu());
startActivity(intent);
}
Toast.makeText(this, menu.getNombre_plato(), Toast.LENGTH_LONG).show();
}
private class WebService extends AsyncTask<String, Void, Void>{
private ProgressDialog dialog;
@Override
protected Void doInBackground(String... params) {
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
Universidad[] universidadArray=null;
try{
universidadArray = restTemplate.getForObject(SERVER_URL + SERVER_GETUNIVERSIDAD, Universidad[].class);
}catch (Exception e){
}
for(Universidad universidad : universidadArray){
getListaUniversidad().add(universidad);
}
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(MainActivity.this);
dialog.setTitle(R.string.mensaje_cargando);
dialog.show();
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if (dialog != null)
dialog.dismiss();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
private class WebServicePais extends AsyncTask<String, Void, Void>{
private ProgressDialog dialog;
@Override
protected Void doInBackground(String... params) {
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
Pais[] paisArray = restTemplate.getForObject(SERVER_URL+SERVER_GETPAIS, Pais[].class);
getListaPais().addAll(Arrays.asList(paisArray));
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
//spinner_universidad.setAdapter(null);
/*dialog = new ProgressDialog(MainActivity.this);
dialog.setTitle(R.string.mensaje_cargando);
dialog.show();*/
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
if (dialog != null)
dialog.dismiss();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
private class WebServiceFacultad extends AsyncTask<String, Void, Void>{
@Override
protected Void doInBackground(String... params) {
int id_uni = Integer.parseInt(params[0]);
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
Facultad[] facultadArray = restTemplate.getForObject(SERVER_URL + SERVER_GETFACULTAD_ID_UNI+id_uni, Facultad[].class);
getListaFacultad().addAll(Arrays.asList(facultadArray));
return null;
}
}
private class WebServiceMenu extends AsyncTask<String, Void, Void>{
private ProgressDialog dialog;
@Override
protected Void doInBackground(String... params) {
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
Menu[] menu = restTemplate.getForObject(SERVER_URL+SERVER_GETMENU+SERVER_GETMENU_DIA+params[0]
+SERVER_GETMENU_ID_FACULTAD+Integer.parseInt(params[1]), Menu[].class);
getListaMenu().addAll(Arrays.asList(menu));
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
getListaMenu().clear();
dialog = new ProgressDialog(MainActivity.this);
dialog.setTitle(R.string.mensaje_cargando);
dialog.show();
}
protected void onPostExecute(Void aVoid) {
if (dialog != null)
dialog.dismiss();
//menuAdapter.notifyDataSetChanged();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
//menuAdapter.notifyDataSetChanged();
}
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(android.view.Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_settings) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
public List<Universidad> getListaUniversidad() {
return listaUniversidad;
}
public void setListaUniversidad(List<Universidad> listaUniversidad) {
this.listaUniversidad = listaUniversidad;
}
public List<Pais> getListaPais() {
return listaPais;
}
public void setListaPais(List<Pais> listaPais) {
this.listaPais = listaPais;
}
public List<Facultad> getListaFacultad() {
return listaFacultad;
}
public void setListaFacultad(List<Facultad> listaFacultad) {
this.listaFacultad = listaFacultad;
}
public List<Menu> getListaMenu() {
return listaMenu;
}
public void setListaMenu(List<Menu> listaMenu) {
this.listaMenu = listaMenu;
}
public List<Menu> getListaPlatos() {
return listaPlatos;
}
public void setListaPlatos(List<Menu> listaPlatos) {
this.listaPlatos = listaPlatos;
}
}
每一行都使用这个XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/menu_item_imv"
android:layout_width="118dp"
android:layout_height="80dp"
android:focusable="false"/>
<Switch
android:id="@+id/switch1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Switch" />
<LinearLayout
android:layout_width="270dp"
android:layout_height="80dp"
android:orientation="vertical">
<TextView
android:id="@+id/menuitem_tv_nombre_plato"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="TextView"
android:textAlignment="center"
android:textColor="@color/colorPrimaryDark"
/>
</LinearLayout>
</LinearLayout>
有人可以帮助我吗？
答案 0 :(得分：0)
使用单击适配器内部。类似的原因我不知道你的适配器类我从我的代码粘贴。
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
convertView = mInflater.inflate(R.layout.item_card_list, null);
}
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
}
});
convertView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View view) {
return true;
}
});
return convertView;
}
答案 1 :(得分：0)
TL; DR我的直觉反应将是重叠的听众（我在一个活动中计算了6个单独的监听器调用）。将Log.e事件放在每个侦听器中，单击要单击的内容并查看Log.e触发的内容。你会知道正在调用什么是Listener（换句话说，哪个Listener正在吞噬你点击事件）。
如果没有被解雇，你很可能没有正确实现你的听众。
答案 2 :(得分：0)
如果您创建自定义适配器会很好。
尝试以下链接： -
http://www.journaldev.com/10416/android-listview-with-custom-adapter-example-tutorial